4results about "Generator circuit arrangements control" patented technology

An aircraft turbine engine including at least a propulsion shaft and an electric motor. A rotor is rigidly connected to the propulsion shaft. The electric motor includes at least three power channels, a control device designed to determine a control parameter for each power channel on the basis of a control command, and a correction device designed to correct a precession movement of the rotor relative to the stator. The correction device being designed to determine the control command of the control device from a setpoint command and a precession level. The control command being designed to generate a global magnetic force opposing the precession movement of the rotor so as to damp said movement.

It is described a method of operating an, in particular multiple winding set, electrical synchronous machine (2), in particular during synchronization of a position observer, comprising a rotor (3) and a stator (4) having a first winding set (5) and in particular at least one second winding set (6), the method comprising: using a first position observer (12_1) configured to observe the first winding set (5) in order to observe a first value (13_1) of the rotor position, in particular based on an external initial value of the rotor position; synchronizing the machine (2) based on the first observed value (13 1) or an external initial value of the rotor position.

There is described an electric power generating apparatus having: a free-piston linear expander having a moving shaft creating mechanical power; an electrical generator converting the mechanical power into electrical power; a variable frequency drive configured for applying an electromagnetic load force modifying the shaft's movement; and a controller communicatively coupled to the variable frequency drive, the controller configured to perform the steps of: receiving sensor data including a first shaft position value, a first shaft velocity value, and a first electromagnetic load force value; using a drive control module, determining, based on the sensor, a second electromagnetic load force value which when applied would cause a shaft velocity to gradually change to a second shaft velocity value, the second electromagnetic load force value and the second shaft velocity value causing an output power value to correspond to a desired output power value; and applying the second electromagnetic load force value.

The invention discloses a rotor position estimation method during a rotary transformer fault of a variable-pitch motor, and the method comprises the steps: carrying out the estimation of a sliding-mode observer control model based on the measurement values of motor current and motor voltage, and obtaining a motor back electromotive force high-frequency pulse signal; performing filtering processing on the back electromotive force high-frequency pulse signal to obtain a back electromotive force observation signal in a continuous wave shape, performing calculation based on the back electromotive force observation signal to obtain a rotor flux linkage observation angle, and performing lag angle theta compensation correction on the rotor flux linkage observation angle, taking the rotor flux linkage angle obtained after compensation and correction as an estimation result of the rotor position; the whole calculation process is simple and efficient, and the stability is good; during application, when the decoding signal of the rotary transformer is detected to be abnormal, the estimation result of the rotor position is extracted to replace the abnormal decoding signal of the rotary transformer, so that the paddle feathering work of the variable-paddle driver is ensured to be continuously and normally executed, the paddle returns to the safe position, and the economic loss is avoided.